[1] Natl Cheng Kung Univ, Dept Family Med, Coll Med, Tainan, Taiwan
[2] Natl Cheng Kung Univ, Dept Neurol, Coll Med, Tainan, Taiwan
[3] Natl Cheng Kung Univ, Inst Biomed Engn, Tainan, Taiwan
[4] Natl Cheng Kung Univ Hosp, Dept Family Med, Tainan, Taiwan